Here is the cost so far that I have found for the MTX Jack Hammer.
MTX T9922 [ subwoofer ]
Lowest New Price - $3,499.95
MTX T9922 22" 5000 RMS Subwoofer (320lbs.)
Carbon/Glass Cone and Dust Cap with Honeycomb Center
6.5" Flat Wound Voice Coil 17 AWG Alumunim Wire
Interchangable Cone for SQ Applications and SPL Applications without removing the sub
Thunder Audio Video LightAV.com 877-390-1599 Online Since 1995
Here's were you go to see the price
http://www.the-electronics-depot.com...ent_page2.html